Top-emitting microcavity white organic light-emitting diodes

Conventional white light emitting diodes (WOLEDs) rely on complex multi-emitter or doped architectures, leading to fabrication challenges and color instability. Thus, a simplified fabrication approach is needed utilizing existing monochromatic emitters to fabricate WOLED. We demonstrate an ITO-free, top-emitting WOLED using a single blue emitter in a metal-clad microcavity structure. We achieve broader white light emission without multiple emitters or doping by leveraging cavity filtering and surface plasmon interactions. This ITO-free approach simplifies device architecture while offering a promising solution for next-generation lighting applications.